Maximum power point tracker

for PV applications

Chernigiv State Technological UniversityOleksandr Veligorskyi

Ruslan ZarovskyiMaksim Khomenko

2

World energy consumption

© BP Statistical Review of World Energy 2011

3

Renewable Energy Share

© Renewables 2011 Global Status Report. 2011.

4

Top 10 by solar PV capacity

© Renewables 2011 Global Status Report. 2011.

5

Advantages of the solar energy

complementarities with traditional and other renewable energy sources,

flexibility (mobile, roof- or ground-mounted), environmental-friendly (no produces noise), little need of maintenance (PV system have

no move or rotate parts), lifetimes – up to 30 years.

6

PV World Capacity vs. Papers

1996

1998

2000

2002

2004

2006

2008

2010

2012

0

10

20

30

40

50

60

70 PV Exist. World Cap., GW Papers MPPT, pcs

7

Main applications of PV

Stand-alone (off-grid) Uses: remote region (remote wireless sensors,

small chargers, navigation lights, etc) or when on-grid connection is unnecessary.

Contains: storage battery and converter (DC-DC, DC-AC), maximum power point tracker (MPPT).

8

Main applications of PV

Grid-connected (on-grid) Uses: connected to local electricity network. Contains: converter (DC-AC), may not have

storage, maximum power point tracker (MPPT).

Fed-in tariff (0.2…0.48 €/kWh, biggest tariff in the world – 0.48 €/kWh in Ukraine).

© Ernő Paál, Zoltán Tatai. 2010.

9

Maximum power point of the PV

0.1

0.2

0.3

IPV, A

0 4 8 12 VPV, V P, W

1

2

3

0 4 8 12 VPV, V

1/RL1

10

Current-voltage dependence of the PV

0.1

0.2

0.3

IPV, A

MPP

0 4 8 12 VPV, V

S=1000 W/m2, Т=25°С

S=500 W/m2, Т=25°С

S=100 W/m2, Т=25°С

P, W

1

2

3

0 4 8 12 VPV, V

S=1000 W/m2, Т=25°С

S=500 W/m2, Т=25°С

S=100 W/m2, Т=25°С

0.1

0.2

0.3

IPV, A

4 8 12 VPV, V

S=1000 W/m2, Т=25°С

S=1000 W/m2, Т=45°С

S=1000 W/m2, Т=65°С

0.1

0.2

0.3

IPV, A

4 8 12 VPV, V

S=1000 W/m2, Т=25°С

S=1000 W/m2, Т=45°С

S=1000 W/m2, Т=65°С

11

Maximum power point tracker

Buck-converter

MPPT controller

VPV

IPV

PWM

MPPT

Load PV-array

12

Let’s start!

13

Schematic design

14

Simulation in progress

15

PCB 2D design

16

PCB 3D design

17

Exposure

18

Chemical operations

19

In-operation control

20

Development

21

Final quality verification

22

Mounting holes drilling

23

In the storage room

24

Soldering equipment

25

Soldering

26

We’ve made it!

Pin spacing – 0.5 mm!!!

Pin width – 0.3 mm!!!

27

Boards are completed!

28

Installation in progress

29

Tuning

30

Useful stuff

31

Coding and debugging

32

Development of the control program

33

Load characteristic (Vout vs. Iout) of the buck-converter

0 2 4 6 8

5

10

15

20

Iout, A

Vo

ut,

V

Vout=5 VVout=14 VVout=20 V

34

Efficiency characteristics of the buck-converter

0 2 4 6 80.4

0.5

0.6

0.7

0.8

0.9

1

Iout, A

Effi

cie

ncy

Vout=5 VVout=14 VVout=20 V

35

Efficiency characteristics of the buck-converter

0 200 400 600 800 1000 1200 14000.6

0.65

0.7

0.75

0.8

0.85

0.9

0.95

1

Frequency, kHz

Effi

cie

ncy

36

We appreciate your help!

37

Final presentation

38

Awarding certificates

39

Special thanks to:

Our supervisor - Yuriy Vagapov. Staff – Roy Harper and Dez Adams. International Centre – Olga Edvards and

other staff.